AS14041 University Corporation for Atmospheric Research
2001:468:500::/40 - NET-UCAR-V6
V6NetHandle: NET6-2001-468-500-1 OrgID: UCAR-1 Parent: NET6-2001-468-1 NetName: NET-UCAR-V6 NetRange: 2001:468:500:: - 2001:468:5FF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: reallocation OriginAS: 14041, 194 RegDate: 2013-07-10 Updated: 2013-07-10 Source: ARIN OrgID: UCAR-1 OrgName: University Corporation for Atmospheric Research CanAllocate: Street: 1850 Table Mesa Drive City: Boulder State/Prov: CO Country: US PostalCode: 80305 RegDate: 1988-05-26 Updated: 2011-09-24 OrgAdminHandle: PS24-ARIN OrgAbuseHandle: PS24-ARIN OrgTechHandle: PS24-ARIN OrgNOCHandle: ZN10-ARIN Source: ARIN
IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.
Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.